Kwik Ceramic bearings are made using ceramic ball bearings, which accelerate faster and roll further than their steel counterparts and have a higher resistance to dirt, moisture and also have a higher chemical resistance. Titanium Nitride hardens and strengthens the surfaces that it is applied to, giving a life expectancy of three or more times longer versus bearings without this coating Striking metallic gold finish Size: 8 mm Comes as set of 16 bearings in its own carrying case